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Open AccessArticle

Research on the Cascade-Connected Transducer with Multi-Segment Used in the Acoustic Telemetry System while Drilling

by Duo Teng 1,2
1
School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China
2
National Key Laboratory for Underwater Information Processing and Control, Xi’an 710072, China
Micromachines 2019, 10(10), 712; https://doi.org/10.3390/mi10100712
Received: 22 September 2019 / Revised: 16 October 2019 / Accepted: 18 October 2019 / Published: 21 October 2019
(This article belongs to the Special Issue Piezoelectric Transducers: Materials, Devices and Applications)
The electroacoustic transducer with the performances of low frequency, small size, and high power is desired in the application of the acoustic telemetry system while drilling. In order to fulfill the severe requirements, a novel cascade-connected transducer with multi-segment is developed. The essential framework of such a transducer is to add the cross-beams in the multi-segment cascade-connected arrangement, based on the fundamental configuration of the longitudinal transducer. The flexural vibrations of cross-beams help the transducer to present the appropriate coupling between longitudinal and flexural vibrations, which provide many benefits in keeping the advantages of the longitudinal transducer and lowering the resonance frequency. It is the finite element method to be used for simulating the mode shapes of the cascade-connected transducer, especially the behavior of the cross-beams, and some performances of transducer are also predicted. Several prototypes of cascade-connected transducers with different segments are manufactured. Their related tests show a good agreement with the finite element simulations and analyses. Their characteristics of low frequency, small size, light weight, and high power are attractive for the transmitting or receiving application in the acoustic telemetry system while drilling. View Full-Text
Keywords: cascade-connected transducer; low frequency; small size; finite element; acoustic telemetry; measurement while drilling cascade-connected transducer; low frequency; small size; finite element; acoustic telemetry; measurement while drilling
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Teng, D. Research on the Cascade-Connected Transducer with Multi-Segment Used in the Acoustic Telemetry System while Drilling. Micromachines 2019, 10, 712.

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